PLC (Programmable Logic Controller)-based automatic timing system and timing method thereof

Abstract

The invention relates to a PLC (Programmable Logic Controller)-based automatic timing system and a timing method thereof, which are used for automatically calculating the workload per shift of workers in a metal product plant. The system comprises a motor, an alternating current contactor, a PLC controller and an upper computer, wherein the motor is arranged at one end of a finished product line; the PLC controller is used for acquiring a switching signal of the alternating current contactor, calculating the running time of the motor, and transmitting data to the upper computer over an industrial Ethernet network; the upper computer is used for calculating the yields of each draw bench and each nail making machine according to the running time of the motor, and directly generating a report for calculating the work amount of each worker; meanwhile, the upper computer is used for transmitting a zero clearing command to a PLC main station; after the PLC main station clears all data of a current shift, the system starts a new round of timing. By adopting the automatic timing system, the waste of labor-hour caused by weighting of finished products before the workers get off work every day is avoided, the purchasing and maintaining costs of weighing equipment are saved, meanwhile the production rhythm is accelerated, and the production efficiency is increased.

Description

technical field [0001] The present invention relates to a PLC-based automatic timing system and its timing method, in particular to an automatic timing system for the settlement of workload per shift of wire drawing machines and nail making machine workers in metal product factories, belonging to the technical field of intelligent control . Background technique [0002] In metal products factories, especially in nail-making workshops, workers' wages are settled according to output, so workers need to calculate the output of each shift before the end of each day's work and the start of the next shift. The traditional statistical method is to weigh the finished products, which not only needs to increase the cost of weighing equipment and equipment maintenance, because the output of each equipment needs to be weighed separately, the quantity is large, and it also causes waste of man-hours. Contents of the invention [0003] The purpose of this invention is to overcome the sh...

AI Technical Summary

Problems solved by technology

The traditional statistical method is to weigh the finished products, which not only needs to increase the cost of weighing equipment and equipment maintenance, because the output of each equipment needs to be weighed separately, the quantity is large, and it also causes waste of man-hours

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